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Students’ Leaf Blower Suppressor To Hit Retail
(hackaday.com)
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this post was submitted on 20 May 2024
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Based on how it works, (not how they say it works) you need a different geometry depending on the frequency. So it's only going to work at select rpm.
It squashes the fundamental and certain harmonics and fractional harmonics.
Since I probably won't be able to patent the idea myself anymore, maybe I'll publicly disclose.
If anything changes, and you have an STL or 3d model you can still sell it.